Gamow, G. (1963). Planet called earth. "Published previously as Biography of the earth.
استشهاد بنمط شيكاغوGamow, George. Planet Called Earth. "Published Previously as Biography of the Earth. 1963.
MLA استشهادGamow, George. Planet Called Earth. "Published Previously as Biography of the Earth. 1963.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.